The formation of burr is a common phenomenon in metal cutting,its fomation and variety directly affects the quality of workpiece and the efficiency of production. It is one of the key technologies of the precision or super-precision and automatic processing.According to the metal cutting burrs classification system of cutting motion and cutting edges of tools,based on orthogonal metal cutting test,this dissertation systematically expands the researches of the formation of cuttingdirection burr/fracture and ...